Occurrence, Detection and Isolation of Bdellovibrio spps. from some Fresh Water Bodies in Benue State, Nigeria

Şar, Taner; Umeh, E. U.; Akosu, D.D.

doi:10.3923/mj.2015.21.27

Cited by 7 publications

(5 citation statements)

References 9 publications

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“…Additionally, the vibroid-shaped Bdellovibrio sp. strain F16 released from the microparticle was observed under transmission electron microscope after the addition of water (Figure 3), which showed the typical morphological features of bdellovibrios [45]. Besides, it could form round plaques as described by Williams et al (1980) [46] on the double-layer agar plate after incubation for 48 h (Figure S2), which differed from bacteriophage plaques that developed within 24 h [47].…”

Section: Resultsmentioning

confidence: 92%

Encapsulated Bdellovibrio Powder as a Potential Bio-Disinfectant against Whiteleg Shrimp-Pathogenic Vibrios

Cao

Wang

et al. 2019

Microorganisms

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Liquid preparations of bdellovibrios are currently commercialized as water quality improvers to control bacterial pathogens in whiteleg shrimp Penaeus vannamei. However, the efficacy of these liquid preparations is significantly impaired due to a dramatic loss of viable cells during long-term room temperature storage. Thus, new formulations of bdellovibrios are greatly needed for high-stablility room-temperature storage. In the present study, the encapsulated powder of Bdellovibrio sp. strain F16 was prepared using spray drying with 20 g L−1 gelatin as the coating material under a spray flow of 750 L h−1, a feed rate of 12 mL min−1, and an air inlet temperature of 140 °C. It was found to have a cell density of 5.4 × 107 PFU g−1 and to have spherical microparticles with a wrinkled surface and a diameter of 3 μm to 12 μm. In addition, the encapsulated Bdellovibrio powder presented good storage stability with its cell density still remaining at 3.5 × 107 PFU g−1 after 120 days of room-temperature storage; it was safe for freshwater-farmed whiteleg shrimp with an LD50 over 1200 mg L−1, and it exhibited significant antibacterial and protective effects at 0.8 mg L−1 against shrimp-pathogenic vibrios. To our knowledge, this is the first report on a promising Bdellovibrio powder against shrimp vibrios with high stable room-temperature storage.

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Section: Resultsmentioning

confidence: 92%

Encapsulated Bdellovibrio Powder as a Potential Bio-Disinfectant against Whiteleg Shrimp-Pathogenic Vibrios

Cao

Wang

et al. 2019

Microorganisms

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“…The genus, Bdellovibrio , also abundant in the NHC, was previously isolated from the arsenic-rich hot springs of the Himalayas [ 45 ]. Furthermore, Bdellovibrio has also been found in freshwater bodies [ 46 ], polluted rivers [ 47 ], and the human gut [ 48 ]. Thus, Bdellovibrio may be introduced to the NHC owing to the anthropogenic impact on the water body.…”

Section: Discussionmentioning

confidence: 99%

The Evaluation of Bacterial Abundance and Functional Potentials in the Three Major Watersheds, Located in the Hot Spring Zone of the Tatun Volcano Group Basin, Taiwan

et al. 2022

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The Tatun Volcanic Group (TVG), located in northern Taiwan, is characterized by acidic hot springs where the outflow of the hot springs may affect the properties of the associated lotic water bodies. We investigated the bacterial diversity and functional profiles of the Peihuang (PHC), HuangGang (HGC), and Nanhuang Creeks (NHC) located in the TVG basin using 16S rRNA gene sequencing coupled with statistical analyses. Water samples were collected from various streams of the creeks for two months of the year. The NHC showed the highest diversity, richness, and a unique number of phyla, which was followed by the HGC. A reduced number of phyla and a lower diversity was noticed in the PHC. The NHC was found to be abundant in the genera Armatimonas, Prosthecobacter, Pirellula, and Bdellovibrio, whereas the HGC was rich in Thiomonas, Acidiphilium, Prevotella, Acidocella, Acidithiobacillus, and Metallibacterium. The PHC was abundant in Thiomonsa, Legionella, Acidocella, and Sulfuriferula. The samples did not show any strong seasonal variations with the bacterial diversity and abundance; however, the relative abundance of each sampling site varied within the sampling months. The iron transport protein- and the sulfur metabolism-related pathways were predicted to be the key functions in all the creeks, whereas the heavy metal-related functions, such as the cobalt/nickel transport protein and the cobalt–zinc–cadmium efflux system were found to be abundant in the HGC and PHC, respectively. The abundance of Bdellovibrio in the NHC, Diplorickettsia in the HGC, and Legionella in the PHC samples indicated a higher anthropogenic impact over the creek water quality. This study provides the data to understand the distinct bacterial community structure, as well as the functional potentials of the three major watersheds, and helps the knowledge of the impact of the physicochemical properties of the TVG hot springs upon the watersheds.

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“…Few studies on BALOs in freshwater bodies have been reported in the past two decades. In a recent report, Sar et al (2015) described the isolation of 53 BALOs from freshwater systems in Nigeria using three bacteria species. The frequency of isolation of BALOs on the three prey bacteria was 79.2% on E. coli, 18.86% on S. typhi, and 1.88% on Shigella spp.…”

Section: Non-halotolerant Balos and Preymentioning

confidence: 99%

Environmental Regulation of the Distribution and Ecology of Bdellovibrio and Like Organisms

Williams

Chen

2020

Front. Microbiol.

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Occurrence, Detection and Isolation of Bdellovibrio spps. from some Fresh Water Bodies in Benue State, Nigeria

Cited by 7 publications

References 9 publications

Encapsulated Bdellovibrio Powder as a Potential Bio-Disinfectant against Whiteleg Shrimp-Pathogenic Vibrios

Encapsulated Bdellovibrio Powder as a Potential Bio-Disinfectant against Whiteleg Shrimp-Pathogenic Vibrios

The Evaluation of Bacterial Abundance and Functional Potentials in the Three Major Watersheds, Located in the Hot Spring Zone of the Tatun Volcano Group Basin, Taiwan

Environmental Regulation of the Distribution and Ecology of Bdellovibrio and Like Organisms

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